When mounted on a cart using the Cart Assembler, the Hydrator can use its own supply of water and hydrate Farmland with it. This module is nearly useless on its own, but when combined with a Farmer Module, it performs the vital service of keeping farmland from drying out, saving the room Water Source irrigation normally uses. To fill the Hydrator, simply place a bucket of water into the left slot of the Hydrator's GUI. The Cargo Manager can be set up to deposit a full bucket of water to fill the Hydrator's reservoir, and then extract the empty bucket.